Best Sushi in Orlando: What has become a Japanese culinary art with delicious flavor and colorful form, actually evolved from very meager beginnings. In the 7th century, Southeast Asians introduced the technique of pickling. The Japanese acquired this same practice which consisted of packing fish with rice. As the fish fermented the rice produced a lactic acid which in turn caused the pickling of the pressed fish. Nare-Sushi is 1300 years old and refers to the finished edible product resulting from this early method.